The Milwaukee® REDSTICK™ box levels provide industry leading performance with best in-class vial readability, frame durability and magnet strength. The ALL-METAL BACKBONE™ provides the strongest, most durable frame ensuring long-life accuracy. SHARPSITE™ vial technology provides best in-class readability with a magnified bubble and high visibility vial spirit. Amplified rare earth magnets maximize holding power. The Milwaukee® REDSTICK™ box levels are backed by a lifetime accuracy guarantee and a limited lifetime warranty.